- Added translucent blending modes to FMultipatchTexture (not tested yet!)

- Also changed all true color texture creation functions to use proper alpha
  values instead of inverted ones.
- Changed FRemapTable so that all palette entries must contain proper alpha
  values. 
- Fixed: The F1 screen check in m_menu.cpp was missing a NULL pointer check.
- Changed: The boss brain's explosions play weapons/rocklx which is an 
  unlimited sound. This can become extremely loud. Replaced with a new
  sound which is just an alias to weapons/rocklx but has a limit of 4.


SVN r932 (trunk)

src/textures/tgatexture.cpp

@@ -436,7 +436,7 @@ int FTGATexture::CopyTrueColorPixels(FBitmap *bmp, int x, int y, int rotate, FCo
 				r=g=b=a=0;
 				break;
 			}
-			pe[i] = PalEntry(255-a, r, g, b);
+			pe[i] = PalEntry(a, r, g, b);
 		}
     }
     
@@ -506,7 +506,7 @@ int FTGATexture::CopyTrueColorPixels(FBitmap *bmp, int x, int y, int rotate, FCo
 		switch (hdr.bpp)
 		{
 		case 8:
-			for(int i=0;i<256;i++) pe[i]=PalEntry(0,i,i,i);	// gray map
+			for(int i=0;i<256;i++) pe[i]=PalEntry(255,i,i,i);	// gray map
 			bmp->CopyPixelData(x, y, ptr, Width, Height, step_x, Pitch, rotate, pe, inf);
 			break;